<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <style>
        div{
            color: red;
        }
        /* .l1{
            list-style: circle;
        }
        .l2{
            list-style: none;
        }
        .l3{
            list-style: none;
        }
        .l4{
            list-style: none;
        } */
        ul{
            list-style-type: circle;
        }
        .b1{
            width: 200px;
            height: 200px;
            border: 5px solid rgb(70, 172, 150);
            padding:20px
        }
        .b2{
            width: 100px;
            height: 100px;
            border: inherit;
            /* padding:20px */
            background-color: rgb(243, 184, 184);
        }

    </style>
</head>
<body>
    <div>
        <h1>和</h1>
        <p>
            pbiaoqin
            <em>em标签</em>
        </p>
    </div>
    <ul>
        <li class="l1">1</li>
        <li class="l2">2</li>
        <li class="l3">3</li>
        <li class="l4">4</li>
    </ul>
    <div class="b1">
        b1
        <div class="b2">
            b2
        </div>
    </div>
</body>
</html>